Add GitHub Actions docker build for alf image

Author: amit502

.github/workflows/docker-build.yml

@@ -0,0 +1,28 @@
+name: Build and Push Docker Image
+
+on:
+  push:
+    branches: [alfworld-base-adapted]
+  workflow_dispatch: # ← allows manual trigger from GitHub UI
+
+jobs:
+  build:
+    runs-on: ubuntu-latest # ← native linux/amd64, no emulation
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and Push
+        uses: docker/build-push-action@v4
+        with:
+          context: .
+          file: Dockerfile-alf
+          push: true
+          tags: ghcr.io/amit502/reflexion:alf

Dockerfile-alf

@@ -0,0 +1,18 @@
+FROM python:3.9-slim
+
+# Install system dependencies
+RUN apt-get update && apt-get install -y \
+    git \
+    build-essential \
+    gcc \
+    make \
+    && rm -rf /var/lib/apt/lists/*
+
+# Set working directory
+WORKDIR /app
+
+# Install alfworld text-only version
+RUN pip install --no-cache-dir alfworld==0.3.3
+
+# Default command (overridden by the job YAML at runtime)
+CMD ["bash"]