Create VERSION file during docker image build

.gitignore

@@ -8,4 +8,5 @@ kubernetes/green-spider-secret.yaml
 /volumes
 /screenshots
 /k8s-jobs
+/VERSION
 .env

Dockerfile

@@ -30,3 +30,4 @@ ADD rating /workdir/rating
 ADD spider /workdir/spider
 ADD export /workdir/export
 ADD job.py /workdir/
+ADD VERSION /workdir/VERSION

Makefile

@@ -2,10 +2,12 @@ IMAGE := quay.io/netzbegruenung/green-spider:main
 
 DB_ENTITY := spider-results
 
+VERSION = $(shell git describe --exact-match --tags 2> /dev/null || git rev-parse HEAD)
+
 .PHONY: dockerimage spider export
 
 # Build docker image
-dockerimage:
+dockerimage: VERSION
 	docker build --progress plain -t $(IMAGE) .
 
 # Fill the queue with spider jobs, one for each site.
@@ -50,3 +52,5 @@ test:
 		$(IMAGE) \
 		-m unittest discover -p '*_test.py' -v
 
+VERSION:
+	@echo $(VERSION) > VERSION