Update pandoc dockerfile and latex template and fix infinite build, fix pandoc always pull and fix strikethrough (#100, #103 and #115)

internal/render/document.go

@@ -135,9 +135,12 @@ func preprocessDoc(data *renderData, pol *model.Document, fullPath string) error
 %% %s
 
 ---
-header-includes: yes
-head-content: "%s"
-foot-content: "%s confidential %d"
+header-includes: |
+	\usepackage{fancyhdr}
+	\pagestyle{fancy}
+	\fancyhead{}
+	\fancyhead[RO,RE]{%s}
+	\fancyfoot[LO,LE]{%s confidential %d}
 ---
 
 %s

internal/render/pandoc.go

@@ -64,7 +64,7 @@ func dockerPandoc(outputFilename string, errOutputCh chan error) {
 			errOutputCh <- errors.Wrap(err, "unable to remove container")
 			return
 		}
-		errOutputCh <-nil
+		errOutputCh <- nil
 	}()
 
 	err = cli.ContainerStart(ctx, resp.ID, types.ContainerStartOptions{})
@@ -78,7 +78,7 @@ func dockerPandoc(outputFilename string, errOutputCh chan error) {
 
 	if resultValue.StatusCode != 0 {
 		err = <-chanErr
-		errOutputCh <-errors.Wrap(err, "error awaiting Docker container")
+		errOutputCh <- errors.Wrap(err, "error awaiting Docker container")
 		return
 	}