build: Build docs separately and on a later image. Also remove some build dependencies I don't think we need.

.gitea/workflows/build.yaml

@@ -3,6 +3,36 @@ run-name: ${{ gitea.actor }} running 🚀
 on: [push]
 
 jobs:
+  Build-Docs:
+    runs-on: ubuntu-latest
+    container:
+      image: node:trixie-slim
+      valid_volumes:
+        - '/opt/keys'
+      volumes:
+        - /opt/keys:/opt/keys
+    steps:
+      - name: Install build dependencies
+        run: >
+          apt update && apt install -y \
+            build-essential \
+            doxygen \
+            file \
+            git \
+            graphviz \
+            rsync \
+            unzip \
+            zip
+      - name: Get code
+        uses: actions/checkout@v4
+        with:
+          submodules: true
+      - name: Build documentation
+        run: |
+          mkdir -p out/html/ ~/.ssh/
+          make -j`nproc` docs
+          echo 'pildefriends ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIKD3Kde5vDO0TrMBDK0IGGeNGe/XinWAZkSQ/rXxwUjt' >> ~/.ssh/known_hosts
+          rsync -avP --delete -e "ssh -i /opt/keys/ssh.ed25519" out/html/ tfdocs@pildefriends:docs/html/
   Build-All:
     runs-on: ubuntu-latest
     container:
@@ -28,12 +58,10 @@ jobs:
             git \
             graphviz \
             libgpgme11 \
-            libssl-dev \
             mingw-w64 \
             rsync \
             unzip \
-            zip \
-            zlib1g-dev
+            zip
       - name: Get code
         uses: actions/checkout@v4
         with:
@@ -50,7 +78,6 @@ jobs:
           mkdir -p out/html/ ~/.ssh/
           make -j`nproc` docs
           echo 'pildefriends ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIKD3Kde5vDO0TrMBDK0IGGeNGe/XinWAZkSQ/rXxwUjt' >> ~/.ssh/known_hosts
-          rsync -avP --delete -e "ssh -i /opt/keys/ssh.ed25519" out/html/ tfdocs@pildefriends:docs/html/
       - name: Setup JDK
         uses: actions/setup-java@v3
         with: