diff --git a/.github/workflows/docker-build.yaml b/.github/workflows/docker-build.yaml
index 355d71b0..772586e1 100644
--- a/.github/workflows/docker-build.yaml
+++ b/.github/workflows/docker-build.yaml
@@ -13,8 +13,8 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v2
-      - name: Set branch env.
-        run: echo "BRANCH=${GITHUB_REF##*/}" >> $GITHUB_ENV
+      - name: Set SHAIRPORT_SYNC_BRANCH env.
+        run: echo "SHAIRPORT_SYNC_BRANCH=${GITHUB_REF##*/}" >> $GITHUB_ENV
       - name: Set up ssh agent
         uses: webfactory/ssh-agent@v0.5.2 # Can be removed when no longer pulling from private repos.
         with:
@@ -36,7 +36,7 @@ jobs:
           file: ./docker/Dockerfile
           platforms: linux/386,linux/amd64,linux/arm/v6,linux/arm64,linux/arm/v7
           push: true
-          tags: registry.nova.do/shairport-sync:unstable-${{ env.BRANCH }}
+          tags: registry.nova.do/shairport-sync:unstable-${{ env.SHAIRPORT_SYNC_BRANCH }}
           build-args: |
-            BRANCH=${{ env.BRANCH }}
+            SHAIRPORT_SYNC_BRANCH=${{ env.SHAIRPORT_SYNC_BRANCH }}
           ssh: github=${{ env.SSH_AUTH_SOCK }} # Can be removed when no longer pulling from private repos.
\ No newline at end of file
diff --git a/docker/Dockerfile b/docker/Dockerfile
index 1f9f0ca2..d7df1481 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -42,8 +42,10 @@ RUN make install
 # Shairport Sync Build System:
 FROM builder-base AS builder-sps
 
-# This may be modified by the Github Action Workflow.
-ARG SHAIRPORT_SYNC_BRANCH=development
+# This will be modified by the Github Action Workflow and is required
+# to ensure the correct branch is being used.
+ARG SHAIRPORT_SYNC_BRANCH
+RUN test -n "$SHAIRPORT_SYNC_BRANCH"
 
 COPY --from=builder-alac /usr/local/lib/libalac.* /usr/local/lib/
 COPY --from=builder-alac /usr/local/lib/pkgconfig/alac.pc /usr/local/lib/pkgconfig/alac.pc
@@ -62,12 +64,12 @@ RUN make
 RUN make install
 WORKDIR /
 
-RUN --mount=type=ssh,id=github git clone git@github.com:aillwee/shairport-sync.git
 WORKDIR /shairport-sync
-RUN git checkout "$SHAIRPORT_SYNC_BRANCH"
-RUN autoreconf -fi
+COPY . .
+RUN git checkout $SHAIRPORT_SYNC_BRANCH
 RUN git submodule init
 RUN git submodule update
+RUN autoreconf -fi
 # RUN ./configure \
 #         --with-alsa \
 #         --with-dummy \
@@ -128,7 +130,6 @@ RUN adduser -D shairport-sync -G shairport-sync
 # Add the shairport-sync user to the pre-existing audio group, which has ID 29, for access to the ALSA stuff
 RUN addgroup -g 29 docker_audio && addgroup shairport-sync docker_audio && addgroup shairport-sync audio
 
-COPY ./docker/shairport-sync.conf /etc/shairport-sync.conf
 COPY ./docker/start.sh /
 
 RUN chmod +x ./start.sh
diff --git a/docker/README.md b/docker/README.md
index 74b986ca..4e10daae 100644
--- a/docker/README.md
+++ b/docker/README.md
@@ -1,3 +1,12 @@
 # Shairport Sync Docker Image
 
-https://hub.docker.com/r/mikebrady/shairport-sync
\ No newline at end of file
+Available at: https://hub.docker.com/r/mikebrady/shairport-sync
+
+## Build Example (for arm7 devices)
+
+TODO: remove `--ssh` when going public as this is only for private repos.
+```
+docker buildx build --ssh github=$SSH_AUTH_SOCK --platform linux/arm/v7 -f ./docker/Dockerfile --build-arg SHAIRPORT_SYNC_BRANCH=charles-dev -t registry.nova.do/shairport-sync:unstable-development .
+```
+
+`SHAIRPORT_SYNC_BRANCH` is required to ensure the image is built using the expected branch.
\ No newline at end of file
diff --git a/docker/docker-compose.yaml b/docker/docker-compose.yaml
index 4153577a..672639c9 100644
--- a/docker/docker-compose.yaml
+++ b/docker/docker-compose.yaml
@@ -8,5 +8,5 @@ services:
     restart: unless-stopped
     devices:
       - "/dev/snd"
-    volumes:
-      - ./volumes/shairport-sync/shairport-sync.conf:/etc/shairport-sync.conf
\ No newline at end of file
+    # volumes:
+    #   - ./volumes/shairport-sync/shairport-sync.conf:/etc/shairport-sync.conf # Customised Shairport Sync configuration file.
\ No newline at end of file
diff --git a/docker/shairport-sync.conf b/docker/shairport-sync.conf
deleted file mode 100644
index bb447958..00000000
--- a/docker/shairport-sync.conf
+++ /dev/null
@@ -1,14 +0,0 @@
-# Temp sample Configuration File for Shairport Sync on a Raspberry Pi using the built-in audio DAC.
-general =
-{
-  volume_range_db = 60;
-};
-
-alsa =
-{
-  output_device = "hw:0";
-  # Could also be hw:1. aplay -l should help identify the correct one.
-  # e.g. card 1: Headphones [bcm2835 Headphones], device 0: bcm2835 Headphones [bcm2835 Headphones]
-  # card x where x is the number to use above in hw:x
-  mixer_control_name = "Headphone";
-};
\ No newline at end of file