Add Missing Just command

Justfile

@@ -11,3 +11,16 @@ down:
 lint:
     -npm run lint:ts:fix
     -npm run lint:scss:fix
+
+generate:
+    #!/bin/sh
+    API_VERSION="$(cat package.json | jq -r '.api_version')"
+    API_URL="https://git.euph.dev/TowerDefence/Server/releases/download/$API_VERSION/api.yml"
+    rm -rf src/app/core/server
+    mkdir -p src/app/core/server
+    npx @openapitools/openapi-generator-cli \
+      generate \
+      --openapitools src/app/core/openapitools.json \
+      -i "$API_URL" \
+      -g typescript-angular \
+      -o src/app/core/server