[Castopod] bump to nginx to 1.21, php to 8.0 and castopod to alpha 61

pica-castopod/back/Dockerfile

 FROM alpine:3.13 AS downloader
 
-ARG VERSION=v1.0.0-alpha.57
+ARG VERSION=v1.0.0-alpha.61
 
 RUN apk add --no-cache curl jq && \
     curl -L $(curl https://code.podlibre.org/api/v4/projects/2/releases/${VERSION}/assets/links | jq -r .[].url | grep \.tar\.gz) -o castopod.tgz && \
     tar -xzf castopod.tgz
 
-FROM php:7.4-fpm-alpine3.13
+FROM php:8.0-fpm-alpine3.13
 
 COPY entrypoint.sh /entrypoint.sh
 

pica-castopod/docker-compose.yml

@@ -16,7 +16,7 @@ networks:
 
 services:
   app-back:
-    image: registry.picasoft.net/pica-castopod-back:v2.0.0-alpha.57
+    image: registry.picasoft.net/pica-castopod-back:v1.0.0-alpha.61
     build: back
     container_name: "castopod-back"
     volumes:
@@ -28,7 +28,7 @@ services:
     restart: unless-stopped
 
   app-front:
-    image: registry.picasoft.net/pica-castopod-front:v1.0.0-alpha.57
+    image: registry.picasoft.net/pica-castopod-front:v1.0.0-alpha.61
     build: front
     container_name: "castopod-front"
     networks:

pica-castopod/front/Dockerfile

 FROM alpine:3.13 AS downloader
 
-ARG VERSION=v1.0.0-alpha.57
+ARG VERSION=v1.0.0-alpha.61
 
 RUN apk add --no-cache curl jq && \
     curl -L $(curl https://code.podlibre.org/api/v4/projects/2/releases/${VERSION}/assets/links | jq -r .[].url | grep \.tar\.gz) -o castopod.tgz && \
     tar -xzf castopod.tgz
 
-FROM nginx:1.19-alpine
+FROM nginx:1.21-alpine
 
 VOLUME /var/www/html/media