diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
new file mode 100644
index 0000000..1c0f13b
--- /dev/null
+++ b/.github/workflows/release.yml
@@ -0,0 +1,42 @@
+name: Docker Hub
+
+on:
+  push:
+    tags:
+      - 'v[0-9]+.[0-9]+.[0-9]+'
+      - '!v[0-9]+.[0-9]+.[0-9]+[ab][0-9]+'
+
+env:
+  IMAGE_NAME: csdms/bmi-example-c-grpc4bmi
+
+jobs:
+
+  build-and-push:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Get version
+        id: vars
+        run: echo "version=${GITHUB_REF:11}" >> $GITHUB_OUTPUT
+
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Set up Docker buildx
+        uses: docker/setup-buildx-action@v3
+        with:
+          platforms: linux/amd64,linux/arm64
+
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          platforms: linux/amd64,linux/arm64
+          context: images/conda-base
+          push: true
+          tags: ${{ env.IMAGE_NAME }}:latest,${{ env.IMAGE_NAME }}:${{ steps.vars.outputs.version }}
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 0000000..519ec7c
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,49 @@
+name: Test
+
+on:
+  push:
+  pull_request:
+  schedule:
+    - cron: '07 4 3 * *'  # 4:07a on third day of the month
+
+concurrency:
+  group: ${{ github.ref }}-${{ github.workflow }}
+  cancel-in-progress: true
+
+jobs:
+
+  test:
+    name: Run tests
+    if:
+      github.event_name == 'push' || github.event.pull_request.head.repo.full_name != github.repository
+
+    runs-on: ${{ matrix.os }}
+
+    defaults:
+      run:
+        shell: bash -l {0}
+
+    strategy:
+      matrix:
+        os: [ubuntu-latest]
+        python-version: ["3.13"]
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Install requirements
+        run: pip install pytest nbmake -r examples/requirements.txt
+
+      - name: Check example script
+        working-directory: ${{ github.workspace }}/examples
+        run: |
+          python run-model-through-grpc4bmi.py
+
+      - name: Check example notebook
+        run: |
+          pytest examples --nbmake --nbmake-timeout=3000 -v
diff --git a/README.md b/README.md
index c88482f..db3a40f 100644
--- a/README.md
+++ b/README.md
@@ -2,27 +2,45 @@
 
 Set up a [grpc4bmi](https://grpc4bmi.readthedocs.io) server
 to run a containerized version
-of the [Basic Model Interface](https://bmi.readthedocs.io)
+of the [Basic Model Interface](https://bmi.readthedocs.io) (BMI)
 [C example](https://github.com/csdms/bmi-example-c)
 through Python.
 
 ## Build
 
+There are two options for building this project:
+
+1. from a base image, [source-base](./images/source-base/), where grpc and its dependent libraries, grpc4bmi, and the BMI C example are all built from source
+1. from a base image, [conda-base](./images/conda-base/), where grpc and its dependent libraries are installed through conda-forge, the BMI C example is installed from a separate conda-based Docker image, and grpc4bmi is built from source
+
+In each case, the grpc4bmi server is exposed through port 55555.
+
+### source-base
+
 Build this example locally with:
 ```
-docker build --tag bmi-example-c-grpc4bmi .
+docker build --tag bmi-example-c-grpc4bmi images/source-base
 ```
-The image is built on the [mdpiper/grpc4bmi-154](https://hub.docker.com/r/mdpiper/grpc4bmi-154) base image.
+The image is (temporarily) built on the [mdpiper/grpc4bmi](https://hub.docker.com/r/mdpiper/grpc4bmi) base image.
 The OS is Linux/Ubuntu.
 The C BMI example, grpc4bmi, and the grpc4bmi server are installed in `/usr/local`.
-The server is exposed through port 55555.
+
+### conda-base
+
+Build this example locally with:
+```
+docker build --tag bmi-example-c-grpc4bmi images/conda-base
+```
+The image is built on the [csdms/grpc4bmi](https://hub.docker.com/r/csdms/grpc4bmi) base image,
+which is built on the [condaforge/miniforge3](https://hub.docker.com/r/condaforge/miniforge3) base image.
+The OS is Linux/Ubuntu.
+The C BMI example, grpc4bmi, and the grpc4bmi server are installed in `/opt/conda`.
 
 ## Run
 
-Use the grpc4bmi [Docker client](https://grpc4bmi.readthedocs.io/en/latest/container/usage.html#docker)
-to access the BMI methods of the containerized model.
+Use the grpc4bmi Docker client to access the BMI methods of the containerized model.
 
-Install grpc4bmi with *pip*:
+Install with *pip*:
 ```
 pip install grpc4bmi
 ```
@@ -38,11 +56,28 @@ del m  # stop container cleanly
 ```
 
 If the image isn't found locally, it's pulled from Docker Hub
-(e.g., try the `mdpiper/bmi-example-c-grpc4bmi-154` image).
+(e.g., try the `csdms/bmi-example-c-grpc4bmi` image).
 
 For more in-depth examples of running the *Heat* model through grpc4bmi,
 see the [examples](./examples) directory.
 
+## Developer notes
+
+A versioned, multiplatform image built from the *conda-base* image in this repository is hosted on Docker Hub
+at [csdms/bmi-example-c-grpc4bmi](https://hub.docker.com/r/csdms/bmi-example-c-grpc4bmi).
+This image is automatically built and pushed to Docker Hub
+with the [release](./.github/workflows/release.yml) CI workflow.
+The workflow is only run when the repository is tagged.
+To manually build and push an update, run:
+```
+docker buildx build --platform linux/amd64,linux/arm64 -t csdms/bmi-example-c-grpc4bmi:latest --push .
+```
+A user can pull this image from Docker Hub with:
+```
+docker pull csdms/bmi-example-c-grpc4bmi
+```
+optionally with the `latest` tag or with a version tag.
+
 ## Acknowledgment
 
 This work is supported by the U.S. National Science Foundation under Award No. [2103878](https://www.nsf.gov/awardsearch/showAward?AWD_ID=2103878), *Frameworks: Collaborative Research: Integrative Cyberinfrastructure for Next-Generation Modeling Science*.
diff --git a/examples/README.md b/examples/README.md
new file mode 100644
index 0000000..c70fff2
--- /dev/null
+++ b/examples/README.md
@@ -0,0 +1,22 @@
+# examples
+
+Two examples--a [Python script](./run-model-through-grpc4bmi.py)
+and a [Jupyter notebook](./run-model-through-grpc4bmi.ipynb)--that demonstrate how to run
+the C `Heat` model through the grpc4bmi server built in this project.
+
+In a virtual environment,
+install grpc4bmi and other dependencies:
+```sh
+pip install -r requirements.txt
+```
+
+Run the Python example:
+```sh
+python run-model-through-grpc4bmi.py
+```
+It'll produce output in the terminal.
+
+Start JupyterLab and run the example notebook:
+```sh
+jupyter lab run-model-through-grpc4bmi.ipynb
+```
diff --git a/examples/requirements.txt b/examples/requirements.txt
index a881ac7..9885329 100644
--- a/examples/requirements.txt
+++ b/examples/requirements.txt
@@ -1,2 +1,2 @@
 grpc4bmi
-numpy
+jupyter
diff --git a/examples/run-model-through-grpc4bmi.ipynb b/examples/run-model-through-grpc4bmi.ipynb
index 78ef133..a0b7a9f 100644
--- a/examples/run-model-through-grpc4bmi.ipynb
+++ b/examples/run-model-through-grpc4bmi.ipynb
@@ -75,7 +75,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "DOCKER_IMAGE = \"mdpiper/bmi-example-c-grpc4bmi-154\"\n",
+    "DOCKER_IMAGE = \"csdms/bmi-example-c-grpc4bmi:latest\"\n",
     "BMI_PORT = 55555\n",
     "CONFIG_FILE = pathlib.Path(\"/opt/bmi-example-c\") / \"testing\" / \"config.txt\""
    ]
diff --git a/examples/run-model-through-grpc4bmi.py b/examples/run-model-through-grpc4bmi.py
index 66a7236..879fb80 100644
--- a/examples/run-model-through-grpc4bmi.py
+++ b/examples/run-model-through-grpc4bmi.py
@@ -2,7 +2,7 @@
 # Run the C `Heat` model in Python through [grpc4bmi](https://grpc4bmi.readthedocs.io).
 # 
 # `Heat` models the diffusion of temperature on a uniform rectangular plate with Dirichlet boundary conditions.
-# View the model source code and its BMI at https://github.com/csdms/bmi-example-cxx.
+# View the model source code and its BMI at https://github.com/csdms/bmi-example-c.
 
 # Start by importing some helper libraries.
 import os
@@ -16,7 +16,7 @@
 # * which Docker image to use,
 # * the port exposed through the image, and
 # * the location in the image of the configuration file used for the model.
-DOCKER_IMAGE = "mdpiper/bmi-example-c-grpc4bmi-154"
+DOCKER_IMAGE = "csdms/bmi-example-c-grpc4bmi"
 BMI_PORT = 55555
 CONFIG_FILE = pathlib.Path("/opt/bmi-example-c") / "testing" / "config.txt"
 
diff --git a/images/conda-base/Dockerfile b/images/conda-base/Dockerfile
new file mode 100644
index 0000000..6343fa3
--- /dev/null
+++ b/images/conda-base/Dockerfile
@@ -0,0 +1,17 @@
+# A grpc4bmi server for the bmi-example-c `Heat` model.
+FROM csdms/grpc4bmi:0.3.0
+
+LABEL org.opencontainers.image.authors="Mark Piper <mark.piper@colorado.edu>"
+LABEL org.opencontainers.image.source="https://github.com/csdms/bmi-example-cxx-grpc4bmi"
+
+COPY server /opt/heatc-grpc4bmi-server
+WORKDIR /opt/heatc-grpc4bmi-server/_build
+RUN cmake .. -DCMAKE_INSTALL_PREFIX=${CONDA_DIR} && \
+    make && \
+    make install && \
+    make clean
+
+WORKDIR /opt
+
+ENTRYPOINT ["/opt/conda/bin/heatc-grpc4bmi-server"]
+EXPOSE 55555
diff --git a/images/conda-base/README.md b/images/conda-base/README.md
new file mode 100644
index 0000000..d79a84e
--- /dev/null
+++ b/images/conda-base/README.md
@@ -0,0 +1,4 @@
+# conda-base
+
+This is the version of *bmi-example-c-grpc4bmi* built on conda-forge packages.
+See the top-level [README](../../README.md) for more information on building this image.
diff --git a/images/conda-base/server/CMakeLists.txt b/images/conda-base/server/CMakeLists.txt
new file mode 100644
index 0000000..d54b543
--- /dev/null
+++ b/images/conda-base/server/CMakeLists.txt
@@ -0,0 +1,45 @@
+# bmi-example-c-grpc4bmi
+
+cmake_minimum_required(VERSION 3.16)
+project(bmi-example-cxx-grpc4bmi
+  VERSION 0.1.0
+  LANGUAGES CXX
+)
+
+include(GNUInstallDirs)
+
+find_package(PkgConfig REQUIRED)
+
+pkg_check_modules(BMIHEATC REQUIRED IMPORTED_TARGET bmiheatc)
+list(APPEND CMAKE_MESSAGE_INDENT "  ")
+message(STATUS "Include directory: ${BMIHEATC_INCLUDE_DIRS}")
+message(STATUS "Library path: ${BMIHEATC_LINK_LIBRARIES}")
+list(POP_BACK CMAKE_MESSAGE_INDENT)
+
+pkg_check_modules(PROTOBUF REQUIRED IMPORTED_TARGET protobuf)
+list(APPEND CMAKE_MESSAGE_INDENT "  ")
+message(STATUS "Include directory: ${PROTOBUF_INCLUDE_DIRS}")
+message(STATUS "Library path: ${PROTOBUF_LINK_LIBRARIES}")
+list(POP_BACK CMAKE_MESSAGE_INDENT)
+
+pkg_check_modules(GRPC4BMI REQUIRED IMPORTED_TARGET grpc4bmi)
+list(APPEND CMAKE_MESSAGE_INDENT "  ")
+message(STATUS "Include directory: ${GRPC4BMI_INCLUDE_DIRS}")
+message(STATUS "Library path: ${GRPC4BMI_LINK_LIBRARIES}")
+list(POP_BACK CMAKE_MESSAGE_INDENT)
+
+set(server_exe heatc-grpc4bmi-server)
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -lgrpc++_reflection")
+
+add_executable(${server_exe} ${server_exe}.cxx)
+target_link_libraries(${server_exe}
+  ${BMIHEATC_LINK_LIBRARIES}
+  ${PROTOBUF_LINK_LIBRARIES}
+  ${GRPC4BMI_LINK_LIBRARIES}
+)
+target_include_directories(${server_exe} PUBLIC ${GRPC4BMI_INCLUDE_DIRS})
+
+install(
+  TARGETS ${server_exe}
+  RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+)
diff --git a/server/heatc-grpc4bmi-server.cxx b/images/conda-base/server/heatc-grpc4bmi-server.cxx
similarity index 100%
rename from server/heatc-grpc4bmi-server.cxx
rename to images/conda-base/server/heatc-grpc4bmi-server.cxx
diff --git a/Dockerfile b/images/source-base/Dockerfile
similarity index 76%
rename from Dockerfile
rename to images/source-base/Dockerfile
index 47253d2..005fbce 100644
--- a/Dockerfile
+++ b/images/source-base/Dockerfile
@@ -1,5 +1,5 @@
-# grpc4bmi server for the `HeatC` model from bmi-example-c.
-FROM mdpiper/grpc4bmi-154
+# A grpc4bmi server for the bmi-example-c `Heat` model.
+FROM mdpiper/grpc4bmi
 
 LABEL maintainer="Mark Piper <mark.piper@colorado.edu>"
 
@@ -7,11 +7,10 @@ RUN git clone --branch v2.0.3 --depth 1 https://github.com/csdms/bmi-example-c /
 WORKDIR /opt/bmi-example-c/_build
 RUN cmake .. && \
     make && \
-    make test && \
+    ctest -V && \
     make install && \
     make clean
 
-# Build the grpc4bmi server for the `heatc` model.
 COPY server /opt/heatc-grpc4bmi-server
 WORKDIR /opt/heatc-grpc4bmi-server/_build
 RUN cmake .. && \
diff --git a/images/source-base/README.md b/images/source-base/README.md
new file mode 100644
index 0000000..135733c
--- /dev/null
+++ b/images/source-base/README.md
@@ -0,0 +1,5 @@
+# source-base
+
+This is the version of *bmi-example-c-grpc4bmi* built from source.
+See the top-level [README](../../README.md) for more information
+on building this image.
diff --git a/server/CMakeLists.txt b/images/source-base/server/CMakeLists.txt
similarity index 90%
rename from server/CMakeLists.txt
rename to images/source-base/server/CMakeLists.txt
index ad8da16..a14dc5f 100644
--- a/server/CMakeLists.txt
+++ b/images/source-base/server/CMakeLists.txt
@@ -31,7 +31,11 @@ list(POP_BACK CMAKE_MESSAGE_INDENT)
 set(server_exe heatc-grpc4bmi-server)
 
 add_executable(${server_exe} ${server_exe}.cxx)
-target_link_libraries(${server_exe} ${BMIHEATC_LINK_LIBRARIES} ${PROTOBUF_LINK_LIBRARIES} ${GRPC4BMI_LINK_LIBRARIES})
+target_link_libraries(${server_exe}
+  ${BMIHEATC_LINK_LIBRARIES}
+  ${PROTOBUF_LINK_LIBRARIES}
+  ${GRPC4BMI_LINK_LIBRARIES}
+)
 target_include_directories(${server_exe} PUBLIC ${GRPC4BMI_INCLUDE_DIRS})
 
 install(
diff --git a/images/source-base/server/heatc-grpc4bmi-server.cxx b/images/source-base/server/heatc-grpc4bmi-server.cxx
new file mode 100644
index 0000000..c8f002b
--- /dev/null
+++ b/images/source-base/server/heatc-grpc4bmi-server.cxx
@@ -0,0 +1,26 @@
+#include <stdio.h>
+
+#include "bmi_heat.h"
+#include "bmi_grpc_server.h"
+
+
+int main(int argc, char *argv[])
+{
+    printf("BmiHeat C grpc4bmi server\n");
+
+    Bmi *model = (Bmi *) malloc(sizeof(Bmi));
+
+    register_bmi_heat(model);
+
+    {
+        char model_name[BMI_MAX_COMPONENT_NAME];
+        
+        model->get_component_name(model, model_name);
+        printf("%s\n", model_name);
+    }
+
+    run_bmi_server(model, argc, argv);
+
+    free(model);
+    return 0;
+}