added docker-build to github action

.github/workflows/docker-build.yml

@@ -0,0 +1,27 @@
+name: Docker Build
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out the repo
+        uses: actions/checkout@v2
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKER_HUB_USERNAME }}
+          password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          file: ./Dockerfile
+          push: true
+          tags: jmeneghini/midsx_ubuntu:latest

Dockerfile

@@ -16,12 +16,15 @@ RUN python3.10 -m pip install \
     numpy \
     nibabel
 
-# Clone the MIDSX repository, and all submodules
-RUN git clone --recurse-submodules https://github.com/jmeneghini/MIDSX.git /usr/src/MIDSX
+# Make a directory for MIDSX
+RUN mkdir /usr/src/MIDSX
 
 # Set the working directory
 WORKDIR /usr/src/MIDSX
 
+# Copy the source code into the container
+COPY . .
+
 # Build and install MIDSX
 RUN mkdir build && cd build && cmake .. && make install