docker-compose.yml + .env and setup for postgres, jwt, hostnames + healthchecks

.env

@@ -0,0 +1,22 @@
+# Trusted hostname
+HOSTNAME=localhost
+
+# --- Container ports and hostnames ---
+
+BACKEND_HOST=personal-site-backend
+FRONTEND_HOST=personal-site-frontend
+DB_HOST=personal-site-db
+
+# --- Database settings ---
+
+DB_USER=postgres
+DB_PASSWORD=postgres
+DB_DB=data
+
+# --- JWT token settings ---
+
+JWT_SECRET=ThisValueIsObviouslyVerySecret
+JWT_EXPIRATION_ACCESS=2m # Expiration time for access tokens
+JWT_EXPIRATION_REFRESH=7d # Expiration time for refresh tokens
+JWT_ISSUER=personal-site
+JWT_AUDIENCE=users