Migrate database Dockerfile to bionic and upgrade database Now all Dockerfiles use the same base image respectively operating system. At the same time upgraded PostgreSQL and PostGIS to current stable releases.

# documentation
**/README*
**/docs
**/*.md

# backend binary
cmd/gemma/gemma

# Dependency directories
**/node_modules

# local dotenv environment variables file
client/.env.local

# Tags tables
**/TAGS