v0.40

• [BUGFIX] Disable button when no farm assigned #188
• [BUGFIX] Fix hostname validation #181
• [BUGFIX] Fix HTTP 405 when updating a rule #176
• [BUGFIX] Fix output from promgen rules command #186
• [BUGFIX] Fix rule import #189
• [BUGFIX] Fixes for Docker build #174
• [BUGFIX] pk should always be an integer #178
• [CHANGE] Rewrite exporter test button in Vue #187
• [DOCUMENTATION] Fix method for route #185
• [IMPROVEMENT] Add custom promql-query tag #184
• [IMPROVEMENT] Settings helper for Promgen config #183
• [INTERNAL] Refactor unittests #166
• [INTERNAL] Upgrade Django to 2.2.4 #175

Breaking changes

• config_writer:path changes to prometheus:targets
• alert_blacklist changes to alertmanager:blacklist

See promgen/tests/examples/promgen.yml