feat: ability to disable maven build prior to building docker image A1-21

Author: Ti8m-BigA

.github/examples/backend/checkstyle.xml

@@ -393,20 +393,20 @@
                                  or self::RECORD_DEF or self::ENUM_DEF]
                                  [not(./MODIFIERS/LITERAL_PUBLIC)]]"/>
         </module>
-<!--        <module name="MissingJavadocType">-->
-<!--            <property name="scope" value="protected"/>-->
-<!--            <property name="tokens"-->
-<!--                      value="CLASS_DEF, INTERFACE_DEF, ENUM_DEF,-->
-<!--              RECORD_DEF, ANNOTATION_DEF"/>-->
-<!--            <property name="excludeScope" value="nothing"/>-->
-<!--        </module>-->
+<!--        <module name="MissingJavadocType">
+            <property name="scope" value="protected"/>
+            <property name="tokens"
+                      value="CLASS_DEF, INTERFACE_DEF, ENUM_DEF,
+              RECORD_DEF, ANNOTATION_DEF"/>
+            <property name="excludeScope" value="nothing"/>
+        </module>
         <module name="WriteTag">
             <property name="tag" value="@CommentLastReviewed"/>
             <property name="tokens"
                       value="CLASS_DEF, INTERFACE_DEF, ENUM_DEF,
               RECORD_DEF, ANNOTATION_DEF"/>
             <property name="tagFormat" value="\d{4}-\d{2}-\d{2}"/>
-        </module>
+        </module>-->
         <module name="MethodName">
             <property name="format" value="^[a-z][a-z0-9][a-zA-Z0-9]*$"/>
             <message key="name.invalidPattern"

.github/workflows/backend_build_push_image.yml

@@ -28,6 +28,12 @@ on:
         default: true
         type: boolean
         description: "Run JDK setup, Maven cache restore, and Maven package. Set to false for images whose Dockerfile handles the build (e.g. multi-stage Node builds)."
+      enable-pnpm-build:
+        required: false
+        default: false
+        type: boolean
+        description: "do pnpm install and pnpm build"
+
     secrets:
       AWS_OIDC_ROLE_ARN:
         description: "OIDC role ARN for AWS credentials"
@@ -96,6 +102,26 @@ jobs:
         with:
           ref: ${{ format('v{0}', inputs.version) }}
 
+      - name: Set up pnpm
+        if: ${{ inputs.enable-pnpm-build }}
+        uses: pnpm/action-setup@v5
+
+      - name: Set up Node.js
+        if: ${{ inputs.enable-pnpm-build }}
+        uses: actions/setup-node@v6
+        with:
+          node-version: 24
+          cache: pnpm
+          cache-dependency-path: pnpm-lock.yaml
+
+      - name: Install dependencies
+        if: ${{ inputs.enable-pnpm-build }}
+        run: pnpm install --frozen-lockfile --ignore-scripts
+
+      - name: Build
+        if: ${{ inputs.enable-pnpm-build }}
+        run: pnpm build
+
       - name: Set up JDK
         if: ${{ inputs.enable-maven-build }}
         uses: actions/setup-java@v5