diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..2b8fe97
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,13 @@
+FROM alpine:latest
+
+LABEL MAINTAINER="Sebastian Zoll"
+
+ADD ocp4upc.sh /bin/
+RUN apk add --no-cache \
+    curl jq graphviz bash \
+    && chmod 777 /bin/ocp4upc.sh
+
+WORKDIR /documents
+VOLUME /documents
+
+CMD ["/bin/ocp4upc.sh"]
diff --git a/README.md b/README.md
index c192513..eac452d 100644
--- a/README.md
+++ b/README.md
@@ -36,6 +36,13 @@ ppc64le    POWER8/9 little endian
 -----------------------------------------------------------------
 ~~~
 
+## Podman (Docker) Example 
+~~~
+$ podman build -t localhost/ocp4upc .
+$ podman run --rm -it -v $(pwd):/documents -e channel=stable -e depth=2 localhost/ocp4upc ocp4upc.sh 4.2.36-4.7
+~~~
+
+
 ## Examples
 ~~~
 $ ocp4upc.sh 4.6.15
diff --git a/ocp4upc.sh b/ocp4upc.sh
index dd26d5f..842352b 100755
--- a/ocp4upc.sh
+++ b/ocp4upc.sh
@@ -62,7 +62,7 @@ function declare_vars()
   ##ARGs
   [[ ${#args[1]} -lt 3 ]] && usage || VER=${args[1]}
   [[ -z ${args[2]-} ]] && ARC="amd64" || ARC=${args[2]}
-
+  
   ##Target channel calculation & mode detection
   ! [[ ${VER} =~ ^[0-9]([.][0-9]+)([.][0-9]+|$).*$ ]] && usage
   MAJ=$(${BIN}echo ${VER} | ${BIN}cut -d. -f1)
@@ -480,19 +480,34 @@ function main()
     fi
 
     cout "INFO" "Detected mode '${MOD}', targeting channels '$(${BIN}echo "${TRGa[@]}")' for multigraph generation."
-    ##channel selection (default: first channel in the list)
-    cout "INPT" "Select channel from [$(${BIN}echo "${CHANDEF[@]}")], press Enter for default value (${CHANDEF[0]}): " "-n"
-    read -t 10 chan
-    [ $? -ne 0 ] && cout "ERRO" "Selection timed out. Execution interrupted." && exit 3
+    
+    if [ ! -z ${channel+x} ];
+    then
+      chan=${channel}
+    else
+      ##channel selection (default: first channel in the list)
+      cout "INPT" "Select channel from [$(${BIN}echo "${CHANDEF[@]}")], press Enter for default value (${CHANDEF[0]}): " "-n"
+      read -t 10 chan
+      [ $? -ne 0 ] && cout "ERRO" "Selection timed out. Execution interrupted." && exit 3
+    fi
+
     chan=${chan:-"${CHANDEF[0]}"}
     local match="false" #make the channel selection dynamic
     for opt in "${CHA[@]}"; do [[ "${opt}" != "${chan}" ]] && continue || match="true"; done
     [[ "${match}" != "true" ]] && cout "ERRO" "Invalid selection. Execution interrupted." && exit 3
-    ##max depth selection (default: 2)
-    cout "INPT" "Select max depth between [1-9], press Enter for default value (2): " "-n"
-    read -t 10 max_depth
-    max_depth=${max_depth:-"2"}
-    [ $? -ne 0 ] && cout "ERRO" "Selection timed out. Execution interrupted." && exit 3
+    
+    if [ ! -z ${depth+x} ];
+    then
+      max_depth=${depth}
+    else
+      ##max depth selection (default: 2)
+      cout "INPT" "Select max depth between [1-9], press Enter for default value (2): " "-n"
+      read -t 10 max_depth
+      max_depth=${max_depth:-"2"}
+      [ $? -ne 0 ] && cout "ERRO" "Selection timed out. Execution interrupted." && exit 3
+    fi
+    
+    
     ! [[ "${max_depth}" =~ ^[1-9]$ ]] && cout "ERRO" "Invalid selection. Execution interrupted." && exit 3
     local total=$((${#TRGa[@]} * ${max_depth}))
     [[ ${total} -gt 10 ]] && cout "WARN" "Targeting '${#TRGa[@]}' diff minor versions with '${max_depth}' releases per target (${total} edges), please be patient."