chore: drop legacy browsers and speed up docker builds

.dockerignore

@@ -0,0 +1,14 @@
+.git
+.gitea
+node_modules
+dist
+coverage
+.angular
+.cache
+npm-debug.log
+yarn-debug.log
+yarn-error.log
+Dockerfile*
+docker-compose*.yml
+README*
+*.md

browserslist

@@ -5,8 +5,10 @@
 # You can see what browsers were selected by your queries by running:
 #   npx browserslist
 
-> 0.5%
-last 2 versions
-Firefox ESR
+last 2 Chrome versions
+last 2 Edge versions
+last 2 Firefox versions
+last 2 Safari versions
 not dead
-not IE 9-11 # For IE 9-11 support, remove 'not'.
+not op_mini all
+not IE 9-11