Make `cargo new` independent of workdir to be exact

The muslrust images seem to have a workdir of /volume as opposed to / in the
others so doing cargo new like this would create the folder in /volume/app.

docker/Dockerfile.j2

@@ -156,7 +156,7 @@ RUN apt-get update && apt-get install -y \
 
 {% endif %}
 # Creates a dummy project used to grab dependencies
-RUN USER=root cargo new --bin app
+RUN USER=root cargo new --bin /app
 WORKDIR /app
 
 # Copies over *only* your manifests and build files

docker/aarch64/mysql/Dockerfile

@@ -65,7 +65,7 @@ RUN apt-get update && apt-get install -y \
     && rm -rf /var/lib/apt/lists/*
 
 # Creates a dummy project used to grab dependencies
-RUN USER=root cargo new --bin app
+RUN USER=root cargo new --bin /app
 WORKDIR /app
 
 # Copies over *only* your manifests and build files

docker/aarch64/sqlite/Dockerfile

@@ -59,7 +59,7 @@ ENV CARGO_HOME "/root/.cargo"
 ENV USER "root"
 
 # Creates a dummy project used to grab dependencies
-RUN USER=root cargo new --bin app
+RUN USER=root cargo new --bin /app
 WORKDIR /app
 
 # Copies over *only* your manifests and build files

docker/amd64/mysql/Dockerfile

@@ -44,7 +44,7 @@ RUN apt-get update && apt-get install -y \
     && rm -rf /var/lib/apt/lists/*
 
 # Creates a dummy project used to grab dependencies
-RUN USER=root cargo new --bin app
+RUN USER=root cargo new --bin /app
 WORKDIR /app
 
 # Copies over *only* your manifests and build files

docker/amd64/mysql/Dockerfile.alpine

@@ -39,7 +39,7 @@ RUN apt-get update && apt-get install -y \
     && rm -rf /var/lib/apt/lists/*
 
 # Creates a dummy project used to grab dependencies
-RUN USER=root cargo new --bin app
+RUN USER=root cargo new --bin /app
 WORKDIR /app
 
 # Copies over *only* your manifests and build files

docker/amd64/postgresql/Dockerfile

@@ -44,7 +44,7 @@ RUN apt-get update && apt-get install -y \
     && rm -rf /var/lib/apt/lists/*
 
 # Creates a dummy project used to grab dependencies
-RUN USER=root cargo new --bin app
+RUN USER=root cargo new --bin /app
 WORKDIR /app
 
 # Copies over *only* your manifests and build files

docker/amd64/postgresql/Dockerfile.alpine

@@ -39,7 +39,7 @@ RUN apt-get update && apt-get install -y \
     && rm -rf /var/lib/apt/lists/*
 
 # Creates a dummy project used to grab dependencies
-RUN USER=root cargo new --bin app
+RUN USER=root cargo new --bin /app
 WORKDIR /app
 
 # Copies over *only* your manifests and build files

docker/amd64/sqlite/Dockerfile

@@ -38,7 +38,7 @@ ARG DB=sqlite
 RUN rustup set profile minimal
 
 # Creates a dummy project used to grab dependencies
-RUN USER=root cargo new --bin app
+RUN USER=root cargo new --bin /app
 WORKDIR /app
 
 # Copies over *only* your manifests and build files

docker/amd64/sqlite/Dockerfile.alpine

@@ -33,7 +33,7 @@ RUN rustup set profile minimal
 ENV USER "root"
 
 # Creates a dummy project used to grab dependencies
-RUN USER=root cargo new --bin app
+RUN USER=root cargo new --bin /app
 WORKDIR /app
 
 # Copies over *only* your manifests and build files

docker/armv6/mysql/Dockerfile

@@ -65,7 +65,7 @@ RUN apt-get update && apt-get install -y \
     && rm -rf /var/lib/apt/lists/*
 
 # Creates a dummy project used to grab dependencies
-RUN USER=root cargo new --bin app
+RUN USER=root cargo new --bin /app
 WORKDIR /app
 
 # Copies over *only* your manifests and build files

docker/armv6/sqlite/Dockerfile

@@ -59,7 +59,7 @@ ENV CARGO_HOME "/root/.cargo"
 ENV USER "root"
 
 # Creates a dummy project used to grab dependencies
-RUN USER=root cargo new --bin app
+RUN USER=root cargo new --bin /app
 WORKDIR /app
 
 # Copies over *only* your manifests and build files

docker/armv7/mysql/Dockerfile

@@ -54,7 +54,7 @@ RUN apt-get update && apt-get install -y \
     && rm -rf /var/lib/apt/lists/*
 
 # Creates a dummy project used to grab dependencies
-RUN USER=root cargo new --bin app
+RUN USER=root cargo new --bin /app
 WORKDIR /app
 
 # Copies over *only* your manifests and build files

docker/armv7/sqlite/Dockerfile

@@ -48,7 +48,7 @@ RUN sed 's/^deb/deb-src/' /etc/apt/sources.list > \
         libc6-dev:armhf
 
 # Creates a dummy project used to grab dependencies
-RUN USER=root cargo new --bin app
+RUN USER=root cargo new --bin /app
 WORKDIR /app
 
 # Copies over *only* your manifests and build files