Add script to simplify connecting to DB from a pod (#1291)

TeachingRecordSystem/Dockerfile

@@ -8,8 +8,11 @@ COPY src/TeachingRecordSystem.Cli/bin/Release/net8.0/publish/ Apps/TrsCli/
 COPY src/TeachingRecordSystem.SupportUi/bin/Release/net8.0/publish/ Apps/SupportUi/
 COPY src/TeachingRecordSystem.Worker/bin/Release/net8.0/publish/ Apps/Worker/
 COPY src/TeachingRecordSystem.AuthorizeAccess/bin/Release/net8.0/publish/ Apps/AuthorizeAccess/
+COPY db.sh Apps/db.sh
 WORKDIR /Apps
 
+RUN chmod +x /Apps/db.sh
+
 # Install Culture prerequisities
 RUN apk add --no-cache \
         tzdata \

TeachingRecordSystem/db.sh

@@ -0,0 +1,8 @@
+ENV_VARS=$(env | grep DefaultConnection | sed 's/^ConnectionStrings__DefaultConnection=//' | awk -v RS=';' -v FS='=' '
+/^Server/ { print "export PGHOST=" $2 }
+/^Database/ { print "export PGDATABASE=" $2 }
+/^User Id/ { print "export PGUSER=" $2 }
+/^Password/ { print "export PGPASSWORD=" substr($0, 10) }
+')
+eval "$ENV_VARS"
+psql