ci: fixed more linting things, made deployment conditional on passing

.github/workflows/cd.yml

@@ -1,10 +1,16 @@
 ---
   name: Continuous Delivery
 
-  # Trigger this workflow manually or by pushing commits to any branch.
+  # Trigger this workflow manually or after successful testing.
   on:
-    push:
     workflow_dispatch:
+    workflow_run:
+      branches:
+        - main
+      workflows:
+        - Continuous Integration
+      types:
+        - completed
 
   concurrency:
     group: ${{ github.workflow }}-${{ github.ref }}
@@ -14,9 +20,18 @@
     deploy:
       runs-on: ubuntu-latest
       steps:
-        # Build the deployment package.
+        # Use the same hardware architecture and the same Python version
+        # as the Lambda function.
         - uses: actions/checkout@v4
-        - run: zip lambda-function.zip *.py *.html
+        - uses: actions/setup-python@v5
+          with:
+            python-version: '3.12'
+
+        # Build the deployment package.
+        - run: |
+            pip install --no-compile --target build .
+            cd build
+            zip -r ../lambda-function.zip .
   
         # Log into AWS.
         - uses: aws-actions/configure-aws-credentials@v4

.github/workflows/ci.yml

@@ -25,4 +25,3 @@ jobs:
 
       # Run the linters.
       - uses: pre-commit/[email protected]
-