fix: add dockerfile to devcontainer

.devcontainer/devcontainer.json

 {
-    "name": "Go Dev Container",
-    "image": "golang:1.20", 
-    "features": {
-        "ghcr.io/devcontainers/features/docker-in-docker:1": {}
+  "name": "Golang Dev Container",
+  "build": {
+    "dockerfile": "../Dockerfile"
   },
+  "postCreateCommand": "go mod tidy",
   "settings": {
-        "go.toolsManagement.autoUpdate": true
+    "terminal.integrated.defaultProfile.linux": "bash"
   },
   "extensions": [
-        "golang.go"
+    "golang.go",
+    "ms-azuretools.vscode-docker"
   ],
-    "postCreateCommand": "go mod tidy",
-    "forwardPorts": [3000],  
-    "mounts": [
-        "source=${localWorkspaceFolder}/.env,target=/workspace/.env,type=bind"
+  "forwardPorts": [
+    3000
   ],
-    "remoteUser": "root",
-    "workspaceFolder": "/workspace",
-    "containerEnv": {
-        "GOPATH": "/go"
-    }
+  "features": {
+    "ghcr.io/devcontainers/features/github-cli:1": {}
+  },
+  "remoteUser": "root"
 }
\ No newline at end of file