chore: update netlify.toml

Author: xming13

netlify.toml

@@ -50,6 +50,9 @@
 # Environment variable overriden for deploy-preview's
 # Deploy preview's are generated by pull/merge requests
 [context.deploy-preview]
+  command = "cd functions/take-screenshot && npm i && cd ../../ && NODE_ENV=production npm run generate"
+  functions = "functions/"
+
 [context.deploy-preview.environment]
   API_BASE_URL = "https://api.staging.coronatracker.com"
   BASE_URL = "https://staging.coronatracker.com"
@@ -60,6 +63,9 @@
 # Branch deployes are applicable for non-master branches
 # Such as staging, dev branches
 [context.branch-deploy]
+  command = "cd functions/take-screenshot && npm i && cd ../../ && NODE_ENV=production npm run generate"
+  functions = "functions/"
+
 [context.branch-deploy.environment]
   API_BASE_URL = "https://api.staging.coronatracker.com"
   BASE_URL = "https://staging.coronatracker.com"