Fix Kubernetes DATABASE_URL and add hardcoded POSTGRES_USER

## Database Connection Fix
- Remove shell variable expansion from Helm deployment template
- Update database.py to construct DATABASE_URL from individual environment variables
- Add POSTGRES_HOST and POSTGRES_PORT as separate environment variables
- Add hardcoded POSTGRES_USER to GitHub Actions workflow at top level

## Technical Details
- Kubernetes doesn't expand shell variables like $(POSTGRES_USER) in env values
- Application now constructs connection string safely from individual components
- POSTGRES_USER hardcoded as 'life_as_code_user' in CI/CD workflow
- Maintains backward compatibility with existing DATABASE_URL if provided

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: nikolay-e

database.py

@@ -20,8 +20,27 @@
 
 # Database configuration
 DATABASE_URL = os.getenv("DATABASE_URL")
+
+# If DATABASE_URL is not set, construct it from individual components
+if not DATABASE_URL:
+    POSTGRES_USER = os.getenv("POSTGRES_USER")
+    POSTGRES_PASSWORD = os.getenv("POSTGRES_PASSWORD")
+    POSTGRES_DB = os.getenv("POSTGRES_DB")
+    POSTGRES_HOST = os.getenv("POSTGRES_HOST", "localhost")
+    POSTGRES_PORT = os.getenv("POSTGRES_PORT", "5432")
+
+    if not all([POSTGRES_USER, POSTGRES_PASSWORD, POSTGRES_DB]):
+        raise ValueError(
+            "DATABASE_URL or individual postgres environment variables (POSTGRES_USER, POSTGRES_PASSWORD, POSTGRES_DB) must be set"
+        )
+
+    DATABASE_URL = f"postgresql+psycopg2://{POSTGRES_USER}:{POSTGRES_PASSWORD}@{POSTGRES_HOST}:{POSTGRES_PORT}/{POSTGRES_DB}"
+    logger.info(
+        f"Constructed DATABASE_URL from environment variables for host: {POSTGRES_HOST}"
+    )
+
 if not DATABASE_URL:
-    raise ValueError("DATABASE_URL environment variable not set")
+    raise ValueError("Could not determine database connection parameters")
 
 # Create engine with connection pooling
 engine = create_engine(

helm/life-as-code-app/templates/deployment.yaml

@@ -62,13 +62,17 @@ spec:
           resources:
             {{- toYaml .Values.app.resources | nindent 12 }}
           env:
-            # Database configuration - always use app's own postgres secret
+            # Database configuration - let app construct DATABASE_URL from individual variables
             {{- if .Values.postgres.enabled }}
-            - name: DATABASE_URL
-              value: "postgresql+psycopg2://$(POSTGRES_USER):$(POSTGRES_PASSWORD)@{{ include "life-as-code-app.postgresql.fullname" . }}:5432/$(POSTGRES_DB)"
+            - name: POSTGRES_HOST
+              value: "{{ include "life-as-code-app.postgresql.fullname" . }}"
+            - name: POSTGRES_PORT
+              value: "5432"
             {{- else }}
-            - name: DATABASE_URL
-              value: "postgresql+psycopg2://$(POSTGRES_USER):$(POSTGRES_PASSWORD)@{{ .Values.postgres.external.host }}:{{ .Values.postgres.external.port }}/$(POSTGRES_DB)"
+            - name: POSTGRES_HOST
+              value: "{{ .Values.postgres.external.host }}"
+            - name: POSTGRES_PORT
+              value: "{{ .Values.postgres.external.port }}"
             {{- end }}
             - name: POSTGRES_DB
               valueFrom: