change image to alpine and fix path space issue

amd64.dockerfile

-FROM debian:buster
+FROM alpine:latest
 
 # linux/amd64
 
 RUN mkdir /app
-COPY ./NDI SDK for Linux/bin/x86_64-linux-gnu/ndi-directory-service /app/
+COPY "./NDI SDK for Linux/bin/x86_64-linux-gnu/ndi-directory-service" /app/
 RUN chmod +x /app/ndi-directory-service
 
 WORKDIR /app

i686.dockerfile

-FROM debian:buster
+FROM alpine:latest
 
 # linux/386
 
 RUN mkdir /app
-COPY ./NDI SDK for Linux/bin/i686-linux-gnu/ndi-directory-service /app/
+COPY "./NDI SDK for Linux/bin/i686-linux-gnu/ndi-directory-service" /app/
 RUN chmod +x /app/ndi-directory-service
 
 WORKDIR /app

rpi1.dockerfile

-FROM debian:buster
+FROM alpine:latest
 
 # linux/arm/v6
 
 RUN mkdir /app
-COPY ./NDI SDK for Linux/bin/arm-rpi1-linux-gnueabihf/ndi-directory-service /app/
+COPY "./NDI SDK for Linux/bin/arm-rpi1-linux-gnueabihf/ndi-directory-service" /app/
 RUN chmod +x /app/ndi-directory-service
 
 WORKDIR /app

rpi2.dockerfile

-FROM debian:buster
+FROM alpine:latest
 
 # linux/arm/v7
 
 RUN mkdir /app
-COPY ./NDI SDK for Linux/bin/arm-rpi2-linux-gnueabihf/ndi-directory-service /app/
+COPY "./NDI SDK for Linux/bin/arm-rpi2-linux-gnueabihf/ndi-directory-service" /app/
 RUN chmod +x /app/ndi-directory-service
 
 WORKDIR /app

rpi3.dockerfile

-FROM debian:buster
+FROM alpine:latest
 
 # linux/arm/v7
 
 RUN mkdir /app
-COPY ./NDI SDK for Linux/bin/arm-rpi3-linux-gnueabihf/ndi-directory-service /app/
+COPY "./NDI SDK for Linux/bin/arm-rpi3-linux-gnueabihf/ndi-directory-service" /app/
 RUN chmod +x /app/ndi-directory-service
 
 WORKDIR /app

rpi4-arm32.dockerfile

-FROM debian:buster
+FROM alpine:latest
 
 # linux/arm/v8
 
 RUN mkdir /app
-COPY ./NDI SDK for Linux/bin/arm-rpi4-linux-gnueabihf/ndi-directory-service /app/
+COPY "./NDI SDK for Linux/bin/arm-rpi4-linux-gnueabihf/ndi-directory-service" /app/
 RUN chmod +x /app/ndi-directory-service
 
 WORKDIR /app

rpi4-arm64.dockerfile

-FROM debian:buster
+FROM alpine:latest
 
 # linux/arm64/v8
 
 RUN mkdir /app
-COPY ./NDI SDK for Linux/bin/arm-rpi4-linux-gnueabihf/ndi-directory-service /app/
+COPY "./NDI SDK for Linux/bin/arm-rpi4-linux-gnueabihf/ndi-directory-service" /app/
 RUN chmod +x /app/ndi-directory-service
 
 WORKDIR /app