Added arm builds, improve database

- The program will now be cross-compiled and released for arm as well as x86
- What we previously called "cache" is not actually a cache, as it holds content that can't be always retrieved. Now we're stopping calling it a cache.
- Improved history merging
- Fixed the README to include the database as a volume, and to fix some errors

.woodpecker.yml

@@ -1,12 +1,6 @@
 pipeline:
 
-  build:
-    image: golang
-    commands:
-      - go get ecodash
-      - go build
-
-  docker-publish:
+  docker:
     image: plugins/docker
     settings:
       registry: gitea.massivebox.net
@@ -16,11 +10,19 @@ pipeline:
       password:
         from_secret: auth_token
 
+  build:
+    image: golang
+    commands:
+      - go get ecodash
+      - go build -o ecodash-x86
+      - env GOOS=linux GOARCH=arm go build -o ecodash-arm
+
   prepare-gitea-release:
     image: alpine
     commands:
       - apk update; apk add zip
-      - zip -r ecodash.zip templates ecodash
+      - mv ecodash-x86 ecodash; zip -r ecodash-x86.zip templates ecodash
+      - mv ecodash-arm ecodash; zip -r ecodash-arm.zip templates ecodash
     when:
       event: tag
 
@@ -28,7 +30,7 @@ pipeline:
     image: plugins/gitea-release
     settings:
       base_url: https://gitea.massivebox.net
-      files: ecodash.zip
+      files: ecodash-x86.zip ecodash-arm.zip
       api_key:
         from_secret: auth_token
       title: ${CI_COMMIT_TAG}