diff --git a/DEPLOYMENT.md b/DEPLOYMENT.md
index 47cd67e8ef..be77f0d4de 100644
--- a/DEPLOYMENT.md
+++ b/DEPLOYMENT.md
@@ -17,18 +17,7 @@ You _might_ also need to set your Heroku app's stack to `container`
 $ heroku stack:set container -a <your-app>
 ```
 
-There are two small tweaks made to Backstage's default Dockerfile to run on Heroku:
-
-1. Do not run nginx as the `nginx` user.
-2. Replace the standard port (80) in `/etc/nginx/conf.d/default.conf` with the wildcard `$PORT`, which Heroku will set for us.
-
-These changes are in the `deployment/Dockerfile.heroku` file, which you will need to copy into your root directory before deploying:
-
-```bash
-$ cp deployment/Dockerfile.heroku Dockerfile
-```
-
-With these changes, we can build/push the Docker image to Heroku's container registry and release it to the `web` worker.
+We can now build/push the Docker image to Heroku's container registry and release it to the `web` worker.
 
 ```bash
 $ heroku container:push web -a <your-app>
diff --git a/Dockerfile b/Dockerfile
index 5337207235..cab9ede03f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,11 +8,17 @@ COPY plugins /app/plugins
 
 RUN yarn
 
-COPY . .
+COPY lerna.json tsconfig.json .eslintignore .eslintrc.js /app/
+COPY scripts/ /app/scripts
 
 RUN yarn build
 
 FROM nginx:mainline
 
 COPY --from=builder /app/packages/app/build /usr/share/nginx/html
-COPY ./docker/default.conf /etc/nginx/conf.d/default.conf
+
+COPY docker/default.conf.template /etc/nginx/conf.d/default.conf.template
+COPY docker/run.sh /usr/local/bin/run.sh
+CMD run.sh
+
+ENV PORT 80
diff --git a/deployment/Dockerfile.heroku b/deployment/Dockerfile.heroku
deleted file mode 100644
index 15878c67da..0000000000
--- a/deployment/Dockerfile.heroku
+++ /dev/null
@@ -1,24 +0,0 @@
-FROM node:12 as builder
-WORKDIR /app
-
-COPY package.json yarn.lock .yarnrc .npmrc /app/
-COPY .yarn /app/.yarn
-COPY packages /app/packages
-COPY plugins /app/plugins
-
-RUN yarn
-
-COPY . .
-
-RUN yarn build
-
-FROM nginx:mainline
-
-COPY --from=builder /app/packages/app/build /usr/share/nginx/html
-
-# Run nginx as root
-RUN sed -i 's/user  nginx.*$//' /etc/nginx/nginx.conf
-
-# Copy in the nginx conf template and replace "$PORT" with the environment variable set by heroku
-COPY deployment/default.conf.template /etc/nginx/conf.d/default.conf.template
-CMD /bin/bash -c "envsubst '\$PORT' < /etc/nginx/conf.d/default.conf.template > /etc/nginx/conf.d/default.conf" && nginx -g 'daemon off;'
diff --git a/deployment/default.conf.template b/deployment/default.conf.template
deleted file mode 100644
index 61c32aa95e..0000000000
--- a/deployment/default.conf.template
+++ /dev/null
@@ -1,8 +0,0 @@
-server {
-  listen $PORT default_server;
-
-  location / {
-    root   /usr/share/nginx/html;
-    index  index.html;
-  }
-}
diff --git a/docker/default.conf b/docker/default.conf.template
similarity index 95%
rename from docker/default.conf
rename to docker/default.conf.template
index d01be24dc7..29252f9625 100644
--- a/docker/default.conf
+++ b/docker/default.conf.template
@@ -1,5 +1,5 @@
 server {
-    listen       80;
+    listen       $PORT;
     server_name  localhost;
 
     #charset koi8-r;
@@ -20,4 +20,3 @@ server {
         root   /usr/share/nginx/html;
     }
 }
-
diff --git a/docker/run.sh b/docker/run.sh
new file mode 100755
index 0000000000..7bc5f5fa39
--- /dev/null
+++ b/docker/run.sh
@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+
+# Run nginx as root
+sed -i 's/user  nginx.*$//' /etc/nginx/nginx.conf
+
+# Write selected env vars to nginx config
+envsubst '$PORT' < /etc/nginx/conf.d/default.conf.template > /etc/nginx/conf.d/default.conf
+
+exec nginx -g 'daemon off;'