Add script for making a release

Makefile

@@ -3,3 +3,6 @@ run:
 
 run-docker:
 	docker compose up --detach
+
+release:
+	@./sbdi/make-release.sh

sbdi/README.md

@@ -24,3 +24,12 @@ Build and run in Docker (using Tomcat):
 ```
 make run-docker
 ```
+
+Make a release. This will create a new tag and push it. A new Docker container will be built on Github.
+```
+mats@xps-13:~/src/biodiversitydata-se/dashboard (master *)$ make release
+
+Current version: v2.0.1. Enter the new version (or press Enter for v2.0.2): 
+Updating to version v2.0.2
+Tag v2.0.2 created and pushed.
+```

sbdi/make-release.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+
+# Get the last GitHub tag version
+last_tag=$(git describe --tags --abbrev=0)
+
+major=$(echo "$last_tag" | cut -d. -f1)
+minor=$(echo "$last_tag" | cut -d. -f2)
+patch=$(echo "$last_tag" | cut -d. -f3)
+
+new_patch=$((patch + 1))
+
+echo
+read -p "Current version: $last_tag. Enter the new version (or press Enter for $major.$minor.$new_patch): " new_version_input
+
+if [ -z "$new_version_input" ]; then
+    new_version="$major.$minor.$new_patch"
+else
+    new_version="$new_version_input"
+fi
+
+# Validate the new version format (assuming it follows semantic versioning)
+if ! [[ "$new_version" =~ ^v[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
+    echo "Invalid version format. Please use semantic versioning (e.g., v1.2.3)."
+    exit 1
+fi
+
+echo "Updating to version $new_version"
+
+# Create a new tag
+git tag "$new_version"
+git push origin "$new_version"
+
+echo "Tag $new_version created and pushed."