Add Postgres signed authorization registry

Author: sl5-guy

.devcontainer/Dockerfile

@@ -0,0 +1,5 @@
+FROM mcr.microsoft.com/devcontainers/rust:1-bookworm
+
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends postgresql-client \
+    && rm -rf /var/lib/apt/lists/*

.devcontainer/devcontainer.json

@@ -1,12 +1,18 @@
 {
   "name": "agent-gateway",
-  "image": "mcr.microsoft.com/devcontainers/rust:1-bookworm",
-  "runArgs": [
-    "--userns=keep-id"
+  "dockerComposeFile": "docker-compose.yml",
+  "service": "app",
+  "workspaceFolder": "/workspaces/agent_gateway",
+  "runServices": [
+    "app",
+    "postgres"
   ],
+  "shutdownAction": "stopCompose",
   "containerUser": "vscode",
   "updateRemoteUserUID": false,
   "containerEnv": {
-    "HOME": "/home/vscode"
+    "HOME": "/home/vscode",
+    "AGENT_GATEWAY_DATABASE_URL": "postgres://agent_gateway_admin:agent_gateway_dev@postgres:5432/agent_gateway",
+    "TEST_DATABASE_URL": "postgres://agent_gateway_admin:agent_gateway_dev@postgres:5432/agent_gateway"
   }
 }

.devcontainer/docker-compose.yml

@@ -0,0 +1,35 @@
+services:
+  app:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    command: sleep infinity
+    userns_mode: keep-id
+    volumes:
+      - ..:/workspaces/agent_gateway:cached
+    environment:
+      HOME: /home/vscode
+      AGENT_GATEWAY_DATABASE_URL: postgres://agent_gateway_admin:agent_gateway_dev@postgres:5432/agent_gateway
+      TEST_DATABASE_URL: postgres://agent_gateway_admin:agent_gateway_dev@postgres:5432/agent_gateway
+    depends_on:
+      postgres:
+        condition: service_healthy
+
+  postgres:
+    image: postgres:16
+    environment:
+      POSTGRES_DB: agent_gateway
+      POSTGRES_USER: agent_gateway_admin
+      POSTGRES_PASSWORD: agent_gateway_dev
+    ports:
+      - "5432:5432"
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U agent_gateway_admin -d agent_gateway"]
+      interval: 5s
+      timeout: 5s
+      retries: 12
+    volumes:
+      - agent-gateway-postgres:/var/lib/postgresql/data
+
+volumes:
+  agent-gateway-postgres: