client: pdf-gen: use jpeg, add scale number. * Add a scale number to be visible above the scale bar. * Change image format of the map to be included in the pdf from png to jpeg. This leads to much smaller file sizes.

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

# backend binary
cmd/gemma/gemma

# Dependency directories
**/node_modules

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

# Tags tables
**/TAGS