diff --git a/.gitea/workflows/deploy.yaml b/.gitea/workflows/deploy.yaml
index 3c5a8d8..1c439f6 100644
--- a/.gitea/workflows/deploy.yaml
+++ b/.gitea/workflows/deploy.yaml
@@ -6,6 +6,9 @@ jobs:
   copy:
     runs-on: ubuntu-latest
     steps:
+      - name: Test if destination directory variable is set
+        if: ${{vars.DESTINATION_DIR == '' }}
+        run: exit 1
       - name: Configure SSH
         run: |
           mkdir -p ~/.ssh/
diff --git a/Dockerfile b/Dockerfile
index f022ce4..06d70ab 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,9 +1,9 @@
-FROM node:18
+FROM node:18-alpine
 
 # Set TZ to Singapore to help with syncronizing with singapore's website time
 ENV TZ="Asia/Singapore"
 
-RUN apt-get update && apt-get install -y ffmpeg && apt-get clean
+RUN apk update && apk add --no-cache ffmpeg npm pango-dev g++ make jpeg-dev giflib-dev librsvg-dev
 
 RUN mkdir -p /home/node/app/node_modules
 RUN mkdir -p /home/node/app/images/raw
diff --git a/video.mjs b/video.mjs
index d6a1c3c..904d28d 100644
--- a/video.mjs
+++ b/video.mjs
@@ -45,7 +45,7 @@ export async function createVideo() {
     }
     //run the command ffmpeg -framerate 5 -i %d.png -c:v libx264 -r 30 output.mp4
     return new Promise((resolve, reject) => {
-        exec('ffmpeg -framerate 5 -i images/final/%d.png -c:v libx264 -r 30 out/output.mp4', (err, stdout, stderr) => {
+        exec('ffmpeg -framerate 5 -i images/final/%d.png -c:v h264 -r 30 out/output.mp4', (err, stdout, stderr) => {
             if (err) {
                 reject(err);
                 return;