0.8.0 Release Candidate 6

Changes:

• UI: Make image size responsive to reduce load time on smaller screens
• UI: fix some relative paths when used with ingress

Images:

• x86: blakeblackshear/frigate:0.8.0-rc6-amd64
• x86 w/ nvidia (for ffmpeg only): blakeblackshear/frigate:0.8.0-rc6-amd64nvidia
• Raspberry Pi 3/4 (32bit): blakeblackshear/frigate:0.8.0-rc6-armv7
• Raspberry Pi 4 (64bit): blakeblackshear/frigate:0.8.0-rc6-aarch64