Specify docker images versions

Fix unquoted sentences

Dockerfile

@@ -1,5 +1,5 @@
-FROM ubuntu:focal
+FROM ubuntu:20.04
-LABEL maintainer Brady Wetherington <bwetherington@grokability.com>
+LABEL maintainer="Brady Wetherington <bwetherington@grokability.com>"
 
 # No need to add `apt-get clean` here, reference:
 # - https://github.com/snipe/snipe-it/pull/9201

Dockerfile.alpine

@@ -1,4 +1,4 @@
-FROM alpine:3
+FROM alpine:3.14.2
 # Apache + PHP
 RUN  apk add --no-cache \
         apache2 \

docker-compose.yml

@@ -7,7 +7,7 @@ services:
       dockerfile: Dockerfile.alpine
     container_name: snipeit
     ports:
-    - 8000:80
+    - "8000:80"
     volumes:
     - ./logs:/var/www/html/storage/logs
     depends_on:
@@ -19,7 +19,7 @@ services:
     - snipeit-backend
 
   mariadb:
-    image: mariadb:latest
+    image: mariadb:10.6.4-focal
     volumes:
     - db:/var/lib/mysql
     env_file:
@@ -28,15 +28,15 @@ services:
     - snipeit-backend
 
   redis:
-    image: redis:latest
+    image: redis:6.2.5-buster
     networks:
     - snipeit-backend
 
   mailhog:
-    image: mailhog/mailhog:latest
+    image: mailhog/mailhog:v1.0.1
     ports:
     # - 1025:1025
-    - 8025:8025
+    - "8025:8025"
     networks:
     - snipeit-backend