Switch Docker images to ones with armv7+arm64 support

Dockerfile

@@ -1,4 +1,4 @@
-FROM mcr.microsoft.com/dotnet/core/sdk:3.1-alpine
+FROM mcr.microsoft.com/dotnet/core/sdk:3.1.401
 WORKDIR /app
 
 # Restore/fetch dependencies excluding app code to make use of caching

docker-compose.yml

@@ -43,7 +43,7 @@ services:
     restart: unless-stopped
 
   influx:
-    image: influxdb:alpine
+    image: influxdb:1.8
     volumes:
       - "influx_data:/var/lib/influxdb"
     ports: