[v2.0.0-rc.3] WeasyPrint v53, ARM multi-arch and much smaller image

WeasyPrint: v53.3

Breaking Changes

• Updated to WeasyPrint v53 (includes visual changes) #115
• Switched base image from debian buster to alpine v3.14 (includes visual changes) #119
• Enable HTML presentational hints option in WeasyPrint #156

Improvements

• Reduced Docker image size from 363.98 MB (v1.1) to 59.48 MB (v2) #136 #137 #141 #157 #158 #161 #163 #164 #165
• Added support for ARM64 (Apple Silicon, AWS Graviton, etc.) and ARMv7 (Raspberry Pi) architectures #162 #170
• Using tini as the entrypoint #134
• Disabled Sentry performance sampling of /health endpoint #174