adding arg for apiVersion based on git release

.github/workflows/build.yml

@@ -54,3 +54,5 @@ jobs:
           labels: ${{ steps.docker_meta.outputs.labels }}
           cache-from: type=local,src=/tmp/.buildx-cache
           cache-to: type=local,dest=/tmp/.buildx-cache
+          build-args: |
+            apiVersion=${{ github.event.release.tag_name }}

Dockerfile

@@ -1,6 +1,9 @@
 # get latest golang container
 FROM golang:1.17.5
 
+# get args
+ARG apiVersion=unknown
+
 # create and set workingfolder
 WORKDIR /go/src/
 
@@ -14,7 +17,7 @@ RUN go mod download
 COPY src/ .
 
 # compile the program
-RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o app .
+RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -ldflags="-w -s -X 'main.apiVersion=${apiVersion}'" -o app .
 
 
 # get latest alpine container

src/webserver.go

@@ -14,8 +14,7 @@ import (
 )
 
 // setting TeslaMateApi version number
-// TODO: get the value from git-tag later..
-var apiVersion = "1.11.0"
+var apiVersion = "unspecified"
 
 // defining db var
 var db *sql.DB