chore: update dockerfile to include template folder copying

Dockerfile

@@ -1,6 +1,5 @@
 # Use the official Golang image to create a build artifact.
 # This is based on Debian and sets the GOPATH to /go.
-# https://hub.docker.com/_/golang
 FROM golang:1.19 as builder
 
 # Create and change to the app directory.
@@ -9,34 +8,36 @@ WORKDIR /app
 # Install wkhtmltopdf in the builder stage.
 RUN apt-get update && apt-get install -y wkhtmltopdf && apt-get clean
 
-# Copy go.sum/go.mod and warm up the module cache (so that this
-# rather long step can be cached if go.mod/go.sum don't change)
+# Copy go.sum/go.mod and warm up the module cache.
 COPY go.* ./
 RUN go mod download
 
 # Set the environment variable for Gin in release mode.
 ENV GIN_MODE release
 
-# Now copy the rest
+# Now copy the rest of the application's source code
 COPY . .
 
 # Build the binary.
 RUN CGO_ENABLED=0 GOOS=linux go build -v -o server github.com/savannahghi/clinical
 
 # Use the official Alpine image for a lean production container.
-# https://hub.docker.com/_/alpine
-# https://docs.docker.com/develop/develop-images/multistage-build/#use-multi-stage-builds
 FROM alpine:3 as production
 
-# Install ca-certificates for SSL.
+# Install ca-certificates and other runtime dependencies for wkhtmltopdf.
 RUN apk add --no-cache ca-certificates
 
-# Copy the wkhtmltopdf binary from the builder stage to the production image.
-# The path /usr/bin/wkhtmltopdf is typical for Debian-based installations; adjust if necessary.
+# Copy the wkhtmltopdf binary and related files from the builder stage to the production image.
 COPY --from=builder /usr/bin/wkhtmltopdf /usr/local/bin/
 
 # Copy the Go binary to the production image from the builder stage.
 COPY --from=builder /app/server /server
 
+# Ensure your templates directory is correctly copied into the Docker image.
+COPY --from=builder /app/templates /app/templates
+
+# Set the working directory to where your binary and templates are
+WORKDIR /app
+
 # Run the web service on container startup.
 CMD ["/server"]